2021-08-17_REVISION - M1977342 (4)

Home Browse Search

TR-34 to Permit M-1977-342 Environmental Protection Plan Monitoring: Chemical storage containers are routinely inspected in accordance with the SPCC Plan by Mill personnel to assess effectiveness and integrity of each EPF system. Maintenance and/or updates to facilities, systems, equipment, or procedures are performed as needed to be protective of the environment and to prevent releases. Mill EPF 2.6 — Syntex Storage: Syntex is a frothing agent used in the Mill process. Syntex is a mixture of sodium lauryl sulfate (current product is called Naxolate) and hot water. It is mixed in a 17,000 gallon tank behind the regrind mills, then transferred to a 33,000 gallon storage tank. Effectiveness: Releases of this chemical would be contained directly by the Mill sump system. The Mill sump also contains a high-level alarm to provide warning in the event of a large release. Monitoring: Chemical storage containers are routinely inspected in accordance with the SPCC Plan by Mill personnel to assess effectiveness and integrity of each EPF system. Maintenance and/or updates to facilities, systems, equipment, or procedures are performed as needed to be protective of the environment and to prevent releases. Mill EPF 2.7 - Sodium Lauryl Sulfate Storage: Sodium Lauryl Sulfate (current product is called Naxolate) is a precursor to the frothing agent Syntex that is mixed with hot water in the Mill process. It is stored inside the Mill building in 220 pound drums. Maximum storage quantity at the Henderson Mill is 120 drums (26,400 pounds). Effectiveness: Releases of this chemical would be contained directly by the Mill sump system. The Mill sump also contains a high-level alarm to provide warning in the event of a large release. Monitoring: Chemical storage containers are routinely inspected in accordance with the SPCC Plan by Mill personnel to assess effectiveness and integrity of each EPF system. Maintenance and/or updates to facilities, systems, equipment, or procedures are performed as needed to be protective of the environment and to prevent releases. Mill EPF 2.8 - Tergitol NP-9/9N9 Surfactant Storage: NP-9/91\19 is a surfactant used in the leach circuit in the mill process to prevent"lumping"of concentrate. It is stored as a liquid in a storage tank with a capacity of 9,400 gallons. Prior to its addition into the Mill circuit, NP-9/91\19 is pumped to a gravity feed tank with a 500 gallon capacity. Effectiveness: Releases of this chemical would be contained directly by the Mill sump system. The Mill sump also contains a high-level alarm to provide warning in the event of a large release. Monitoring: Chemical storage containers are routinely inspected in accordance with the SPCC Plan by Mill personnel to assess effectiveness and integrity of each EPF system. Maintenance and/or updates to facilities, systems, equipment, or procedures are performed as needed to be protective of the environment and to prevent releases. Mill EPF 2.9- Quicklime Storage: Quicklime (dry lime, burnt lime or calcium oxide (CaC)) is used for neutralization in the mill circuit. Henderson receives and stores the solid quicklime in a storage tank with a capacity of 31,760 gallons. The quicklime is subsequently hydrated or "slaked" to form calcium hydroxide (Ca(OH)2) and dosed into the tailing slurry. The slaker building is constructed with a 2 foot high foundation wall and drains that will direct any overflow to the tailing discharge line. Climax Molybdenum Company August,2021 Henderson Operations Page 27 of 45